ART. 4 CAMBRIAN CONCHOSTRACA — ULRICH AND BASSLER 11 



Lepidilla anomala Matthew Middle Cambrian (Acadian. Clc2). 



Lepiditta Matthew. 



Lepiditta alata Matthew Middle Cambrian (Acadian, Clc2). 



Lepiditta auriculata Matthew Middle Cambrian (Acadian, Clcl). 



Lepiditta curia Matthew Middle Cambrian (Acadian, Cldl). 



Lepiditta polita (Steusloff) Middle Cambrian drift (Germany) . 



Lepiditta sigillata Matthew Lower Cambrian (Hanfordian, C163). 



Modioloides Walcott. 



Modioloides prisca Walcott _Lov/er Cambrian (New York). 



Modiolopsis thecoides Matthew. Lower Cambrian (Etcheminian), Newfoundland. 

 Mononotella, new genus. 

 Mononoiella fusiformis (Matthew) . 



Lower Cambrian (Hanfordian, C163; Etcheminian, E3/).. 

 Noihozoe? vermontana Walcott (part) = DielymeUa brevis. 

 Polyphyma Groom. 



Polyphyma angelini (Barrande) Upper Cambrian (Sweden). 



Polyphyma armata (Gronwall) * Middle Cambrian (Denmark). 



Polyphyma lapworthi Groom Cambrian (England). 



Polyphyma marginata, new species Upper Cambrian (Newfoundland). 



Primitia acadica Matthew = /ndtana acadica. 

 Primitia aurora M&tthevf — Bradoria aurora. 

 Primitia? fusiformis Matthew = Mononotella fusiformis. 

 Primitia oculata Matthew — Bradoria oculata. 

 Primitia pyriformis Matthew =/«dzano pyriformis. 



Primiitia simplex lloydiana Jones Cambrian (Newfoundland). 



Primitia simplex milneana Jones Cambrian (Newfoundland). 



Primitia simplex sanctojohannensis Jones Cambrian (Newfoundland). 



Primitia solvensis J ones = Indiana solvensis. 

 Schmidtella acuta Matthew =Bradoria acuta. 

 Schmidtella cambrica Matthew = Br adoria cambrica. 

 Schmidtella? pervetus Matthew = Unrecognizable. 



Lower Cambrian (Etcheminian, E3e). 

 Schmidtella? pervetus mut concinna Matthew — Bradoria concinna. 

 Sellula Wiman. 



Sellula fallax Wiman Lower Cambrian (Sweden). 



Walcoitella, new genus. 



Walcotiella apicalis, new species Middle Cambrian (Arizona). 



Walcotiella breviuscula, new species Middle Cambrian (Arizona). 



Walcotiella concenirica, new species Middle Cambrian (Arizona). 



Walcoitella leper ditoides, new species Middle Cambrian (Arizona). 



Walcoitella limaiula, new species Middle Cambrian (Arizona). 



Walcoitella longxda, new species Middle Cambrian (Arizona). 



Walcoitella niiida, new species Middle Cambrian (Arizona). 



Walcoitella oblonga, new species Middle Cambrian (Arizona). 



WalcotteUa obsoleia, new species Middle Cambrian (Arizona). 



Walcotiella pulchella, new species Middle Cambrian (Arizona). 



Walcotiella scitula, new sepcies Middle Cambrian (Arizona) . 



Walcoitella subtruncata, new species Middle Cambrian (Arizona). 



Walcoitella venirosa, new species Middle Cambrian (Arizona). 



